Is Your GMC Savana 2500 Shifting Erratically?
If your 2006-2014 GMC Savana 2500 is experiencing harsh shifting, getting stuck in gear, or displaying a check engine light with transmission codes, a failing Transmission Control Module (TCM) is the most likely culprit. The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every gear change and ensuring smooth, efficient operation. When it fails, it can lead to frustrating and potentially damaging driving conditions, turning your reliable workhorse into an unpredictable liability.
This genuine GM T42 Transmission Control Module, part number 24240449, is the definitive solution to restore your van’s performance. We take the guesswork out of the repair by pre-programming the module to your vehicle’s specific Vehicle Identification Number (VIN). This means it arrives ready for a plug-and-play installation, eliminating the need for an expensive trip to the dealership for programming. Get your Savana back on the road quickly with a part designed to meet and exceed original equipment standards.
From the Diagnostic Bay
We had a 2011 Savana 2500 work van come into the shop that was stuck in ‘limp mode’—third gear only. The driver was burning through fuel and couldn’t get up to highway speed. The scanner showed a P0700 code and several solenoid circuit faults. Instead of chasing down individual solenoids, we suspected the TCM, a common issue on these high-mileage vans. We installed a VIN-programmed T42 module, cleared the codes, and the van was shifting perfectly on the test drive. The customer was back on the job in under an hour, saving significant diagnostic time and money.
Diagnosing a Faulty 2006-2014 Savana 2500 TCM
A failing TCM can manifest in various ways, often starting as intermittent issues before becoming a constant problem. If you’re noticing any of the following symptoms, it’s time to inspect your transmission control module.
- ✔ Harsh Shifting & Delayed Engagement: Your van may slam into gear, hesitate when shifting, or feel like it’s slipping between gears.
- ✔ Stuck in Limp Mode: The transmission may refuse to shift out of a single gear (often 2nd or 3rd) to prevent further damage.
- ✔ Warning Lights: The Check Engine Light or a specific transmission warning light will illuminate on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs): Common codes include P0700 (Transmission Control System Malfunction), P0750-P0758 (Shift Solenoid Errors), and other communication-related faults.
- ✔ Poor Fuel Economy: Inefficient shifting and incorrect torque converter lockup can cause a noticeable drop in MPG.
- ✔ No Upshift or Downshift: The transmission may fail to shift up or down as you accelerate or decelerate.
The Plug-and-Play Solution
This T42 TCM is the ideal replacement for your 2006-2014 Savana 2500 TCM. It is meticulously prepared with the latest GM software updates and programmed directly to your VIN. This critical step ensures that the module communicates flawlessly with your van’s Engine Control Module (ECM) and other systems, restoring the precise shift logic and performance your vehicle had when it was new. Installation is straightforward for a DIY mechanic; on the Savana, the TCM is typically located in the right-hand (passenger side) engine compartment. Simply disconnect the battery, swap the modules, and reconnect. No core charge means you can keep your old part without any hassle.
This module is also a direct replacement for a wide range of other GM vehicles and interchanges with part numbers such as 24252114, 24234503, 24230461, 24234274, 24256960, and YNXS, ensuring broad compatibility and proven reliability.
Frequently Asked Questions
What does “VIN Programmed” mean for my Savana?
VIN programming means we load the module with the specific software and calibrations for your exact vehicle using your van’s unique 17-digit VIN. This makes the part a true plug-and-play solution, as it will be perfectly matched to your engine, transmission, and tire size, eliminating the need for dealer programming.
Will this fix my P0700 transmission code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause of a P0700 and related solenoid codes, you should always confirm the diagnosis. If the TCM itself is the source of the electrical fault, this part is the correct fix.
Is this part difficult to install myself?
For most individuals with basic mechanical skills, installation is simple. On a 2006-2014 Savana 2500, the TCM is easily accessible in the engine bay. The process involves disconnecting the battery, unplugging the electrical connectors, unbolting the old module, and installing the new one. The entire job typically takes less than 30 minutes.
Do I need to return my old TCM?
No, there is no core charge for this part. You can keep your old module without any additional fees or the hassle of returning it.
What happens if I install a non-programmed TCM?
Installing a TCM that is not programmed to your vehicle’s VIN will result in a no-start condition, incorrect shifting, active warning lights, and communication errors with other vehicle modules. Our VIN programming service prevents all of these issues.